Haha nope. Not inviting the pineapple pizza discourse onto the blog.
Most cats prefer to drink somewhere that isn’t close to both their toileting spot and their food spot. They don’t really like to drink next to where they eat unless they have to, so I suspect that’s why she insisted on spooking your fish.
I suspect some cats also like the taste. I’ve met more than one cat who, if given the choice between an aquarium and a bowl of clean water right next to it, will pick the aquarium.